阅读说明：本技术 一种环保型高强度再生建筑陶粒 (Environment-friendly high-strength regenerated building ceramsite ) 是由 苏瑜 苏培 杨松 孙俊 朱子璇 于 2021-09-24 设计创作，主要内容包括：本发明提出了一种环保型高强度再生建筑陶粒,包括以下重量份数组分原料：污泥50-80份、陶粒混凝土废料15-30份、石棉废料6-10份、改性矿石粉8-18份、粘土15-35份、复合纤维8-15份,本申请合理选配原料,采用工业或建筑废料,改性优化,自制再生陶粒,具有优异的力学性能和结构稳定性,流变性好,共混均匀度高,用于混凝土制品,与组分间具有优异的结合效果和强化性能,有效改善了制品的性能参数,符合绿色环保的发展理念,综合实用性强,制得推广应用。(The invention provides an environment-friendly high-strength regenerated building ceramsite which comprises the following raw materials in parts by weight: 50-80 parts of sludge, 15-30 parts of ceramsite concrete waste, 6-10 parts of asbestos waste, 8-18 parts of modified mineral powder, 15-35 parts of clay and 8-15 parts of composite fibers, the raw materials are reasonably selected and matched, industrial or building waste is adopted, the modified and optimized regenerated ceramsite is prepared, and the modified and optimized ceramsite has excellent mechanical property and structural stability, good rheological property and high blending uniformity, is used for concrete products, has excellent combination effect and strengthening performance with components, effectively improves the performance parameters of the products, accords with the development concept of green environmental protection, has strong comprehensive practicability, and is prepared, popularized and applied.)

1. The environment-friendly high-strength regenerated building ceramsite is characterized by comprising the following raw materials in parts by weight: 50-80 parts of sludge, 15-30 parts of ceramsite concrete waste, 6-10 parts of asbestos waste, 8-18 parts of modified mineral powder, 15-35 parts of clay and 8-15 parts of composite fiber.

2. The environment-friendly high-strength recycled building ceramsite according to claim 1, wherein: the modified ore powder raw material is selected from the following raw materials in a mass ratio of 1: 0.3-0.6: 0.2-0.5 of vermiculite, basalt and fluorite.

3. The environment-friendly high-strength recycled building ceramsite according to claim 1, wherein: the preparation method of the modified ore powder comprises the steps of taking raw materials according to the mass ratio, cleaning, crushing, sieving with a 200-mesh sieve, adding a polyvinyl alcohol aqueous solution, uniformly stirring, keeping the temperature in an acidic atmosphere, stirring for 30-150min, taking out, and drying to obtain the modified ore powder.

4. The environment-friendly high-strength recycled building ceramsite according to claim 3, wherein the environment-friendly high-strength recycled building ceramsite comprises: the mass concentration of the polyvinyl alcohol aqueous solution is 8-10wt%, and the addition amount is 15-20wt% of the mass of the ore powder raw material.

5. The environment-friendly high-strength recycled building ceramsite according to claim 3, wherein the environment-friendly high-strength recycled building ceramsite comprises: the acidic atmosphere is 1-1.5M tartaric acid or hydrochloric acid solution.

6. The environment-friendly high-strength recycled building ceramsite according to claim 3, wherein the environment-friendly high-strength recycled building ceramsite comprises: the heat preservation stirring is specifically 50-80 ℃ and 60-300 rpm.

7. The environment-friendly high-strength recycled building ceramsite according to claim 1, wherein: the composite fiber is selected from a mixture of polypropylene fiber and plant fiber, and the plant fiber is selected from any one or more of straw, rice husk and waste paper.

8. The environment-friendly high-strength recycled building ceramsite according to claim 1, wherein: the mass ratio of the polypropylene fiber to the plant fiber in the composite fiber is 1: 0.8-1.5.

Technical Field

The invention relates to the technical field of medium density fiberboard production and processing, in particular to an environment-friendly high-strength regenerated building ceramsite.

Background

The concrete material is a general name of engineering composite material formed by cementing aggregate into a whole by cementing material, cement is used as the cementing material, sand and stone are used as the aggregate, a composite additive and a mineral admixture are mixed with water according to a certain proportion and stirred to obtain the concrete material. There are many types of concrete and many methods of classification, for example, ordinary concrete, high-performance concrete, high-strength concrete, recycled concrete, lightweight aggregate concrete, and foam concrete.

The regenerated concrete is prepared by crushing, cleaning and grading the solid waste blocks of the building, mixing the crushed solid waste blocks with the grading according to a certain proportion, partially or completely replacing natural aggregates such as sand stones and the like, and adding cement, water and the like. The recycled concrete is prepared by replacing natural sandstone aggregate with recycled aggregate, so that the construction waste can be prepared into recycled aggregate which is used as a resource, the consumption of natural sandstone resources is reduced, and the method conforms to the national development policy of sustainability and environmental protection.

According to statistics, the harmless treatment rate of sludge in China is still low, or 20% -30%, and the sludge treatment rate is lower in partial areas. In the main sludge treatment and disposal method, the sludge is subjected to agricultural and landfill treatment by land for sludge disposal, sludge quality and the like, the sludge drying incineration can completely kill pathogenic microorganisms by utilizing heat generated by combustion of organic matters per se, the sludge volume is reduced to the maximum extent, the inorganic matters become extremely small amount of ash after the incineration, and the inorganic components of the incineration ash are close to clay. Because the incineration residue is fundamentally changed in property, the sintering and drying sludge can be used as a mixed material ball of ceramsite, and the market demand is large. Sludge drying incineration is the most thorough sludge treatment and disposal method, so that drying incineration of sludge and application of incinerated ash to building materials are becoming more and more popular. Meanwhile, the solid wastes (such as construction wastes and the like) and agricultural straws and other wastes in China are also in urgent need to be consumed. The ceramsite preparation technology in the prior art can not directly utilize sludge, solid waste, agricultural straws and the like as raw materials.

Based on this, the present application is dedicated to research on a novel regenerated ceramsite, which is optimally formulated to meet development requirements and applications.

Disclosure of Invention

In view of the above, the invention aims to provide an environment-friendly high-strength regenerated building ceramsite, which is prepared by reasonably selecting raw materials, adopting industrial or building waste, modifying and optimizing, self-making regenerated ceramsite, has excellent mechanical properties and structural stability, good rheological property and high blending uniformity, is used for concrete products, has excellent combination effect and strengthening performance with components, effectively improves the performance parameters of the products, conforms to the development concept of environmental protection, has strong comprehensive practicability, and is prepared, popularized and applied.

In order to achieve the purpose, the invention provides the following technical scheme:

an environment-friendly high-strength regenerated building ceramsite comprises the following raw materials in parts by weight: 50-80 parts of sludge, 15-30 parts of ceramsite concrete waste, 6-10 parts of asbestos waste, 8-18 parts of modified mineral powder, 15-35 parts of clay and 8-15 parts of composite fiber.

As further preferred in the invention, the modified ore powder raw material is selected from the following raw materials in a mass ratio of 1: 0.3-0.6: 0.2-0.5 of vermiculite, basalt and fluorite.

The modified ore powder is further preferably prepared by taking the raw materials according to the mass ratio, washing, crushing, sieving with a 200-mesh sieve, adding a polyvinyl alcohol aqueous solution, uniformly stirring, keeping the temperature in an acidic atmosphere, stirring for 30-150min, taking out, and drying.

In a further preferred embodiment of the present invention, the polyvinyl alcohol aqueous solution has a mass concentration of 8 to 10wt% and an addition amount of 15 to 20wt% based on the mass of the raw material of the ore powder.

Further preferred according to the invention is an acidic atmosphere of 1-1.5M tartaric acid or hydrochloric acid solution.

Further preferably, the stirring under the heat-retaining condition is carried out at 50-80 ℃ and 60-300 rpm.

As a further preferred aspect of the present invention, the composite fiber is selected from a mixture of polypropylene fiber and plant fiber, and the plant fiber is selected from any one or more of straw, rice husk and waste paper.

As further preferred in the invention, the mass ratio of the polypropylene fiber to the plant fiber in the composite fiber is 1: 0.8-1.5.

Based on the selection and preparation of the components, the preparation method of the environment-friendly high-strength regenerated building ceramsite is provided:

1) taking materials according to parts by weight, crushing the ceramsite concrete waste into particles with the particle size of 1-5mm, and crushing the asbestos waste into particles with the particle size of 0.5-3mm for later use; mixing the sludge and the modified ore powder, drying until the water content is less than 5%, and crushing until the particle size is less than 5mm for later use;

2) mixing the crushed ceramsite concrete waste, the asbestos waste, the sludge and the modified ore powder in the step 1), quickly adding a proper amount of water, stirring into paste, adding the clay and the composite fiber, continuously stirring for 10-60min, and then granulating to obtain a ceramsite blank;

3) calcining the ceramsite blank at 400-1100 ℃, heating at 20 ℃/min, and keeping the temperature for 10min at each temperature of the whole hundred;

4) cooling to 250 deg.C at a rate of 25 deg.C/min, maintaining the temperature for 10-30min, taking out, and naturally cooling.

The invention has the beneficial effects that: the environment-friendly high-strength regenerated building ceramsite disclosed by the invention is prepared from raw materials reasonably, adopts industrial or building waste, is modified and optimized, is self-made into regenerated ceramsite, has excellent mechanical property and structural stability, good rheological property and high blending uniformity, is used for concrete products, has excellent combination effect and strengthening property with components, effectively improves the performance parameters of the products, accords with the development concept of environmental protection, has strong comprehensive practicability, and is prepared, popularized and applied.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

Example 1:

an environment-friendly high-strength regenerated building ceramsite comprises the following raw materials in parts by weight: 60 parts of sludge, 20 parts of ceramsite concrete waste, 6 parts of asbestos waste, 12 parts of modified mineral powder, 15 parts of clay and 15 parts of composite fiber.

The modified ore powder raw material is selected from the following raw materials in a mass ratio of 1: 0.5: 0.3 of vermiculite, basalt and fluorite.

The preparation method of the modified ore powder comprises the steps of taking raw materials according to the mass ratio, cleaning, crushing, sieving with a 200-mesh sieve, adding a polyvinyl alcohol aqueous solution, uniformly stirring, keeping the temperature in an acidic atmosphere, stirring for 120min, taking out, and drying to obtain the modified ore powder.

Wherein, the mass concentration of the polyvinyl alcohol aqueous solution is 10wt%, and the addition amount is 15wt% of the mass of the ore powder raw material. The acidic atmosphere is a 1.5M solution of tartaric or hydrochloric acid. The stirring is carried out at 60 ℃ and 100 rpm.

Further, the composite fiber is selected from a mixture of polypropylene fiber and plant fiber in a mass ratio of 1:1, and the plant fiber is selected from any one or more of straw, rice hull and waste paper.

Based on the selection and preparation of the components, the preparation method of the environment-friendly high-strength regenerated building ceramsite is provided:

1) taking materials according to parts by weight, crushing the ceramsite concrete waste into particles with the particle size of 1-5mm, and crushing the asbestos waste into particles with the particle size of 0.5-3mm for later use; mixing the sludge and the modified ore powder, drying until the water content is less than 5%, and crushing until the particle size is less than 5mm for later use;

2) mixing the crushed ceramsite concrete waste, the asbestos waste, the sludge and the modified ore powder in the step 1), quickly adding a proper amount of water, stirring into paste, adding the clay and the composite fiber, continuously stirring for 10-60min, and then granulating to obtain a ceramsite blank;

3) calcining the ceramsite blank at 400-1100 ℃, heating at 20 ℃/min, and keeping the temperature for 10min at each temperature of the whole hundred;

4) cooling to 250 deg.C at a rate of 25 deg.C/min, maintaining the temperature for 10-30min, taking out, and naturally cooling.

Example 2:

an environment-friendly high-strength regenerated building ceramsite comprises the following raw materials in parts by weight: 80 parts of sludge, 20 parts of ceramsite concrete waste, 10 parts of asbestos waste, 15 parts of modified mineral powder, 15 parts of clay and 8 parts of composite fiber.

The modified ore powder raw material is selected from the following raw materials in a mass ratio of 1: 0.6: 0.5 vermiculite, basalt and fluorite.

The preparation method of the modified ore powder comprises the steps of taking raw materials according to the mass ratio, cleaning, crushing, sieving with a 200-mesh sieve, adding a polyvinyl alcohol aqueous solution, stirring uniformly, keeping the temperature in an acidic atmosphere, stirring for 60min, taking out, and drying to obtain the modified ore powder.

Wherein, the mass concentration of the polyvinyl alcohol aqueous solution is 10wt%, and the addition amount is 20wt% of the mass of the ore powder raw material. The acidic atmosphere is 1M tartaric acid or hydrochloric acid solution. The stirring is carried out at 50 ℃ and 100 rpm.

Further, the composite fiber is selected from a mixture of polypropylene fiber and plant fiber in a mass ratio of 1:1, and the plant fiber is selected from any one or more of straw, rice hull and waste paper.

The preparation method of the regenerated building ceramsite is the same as that in example 1.

Example 3:

an environment-friendly high-strength regenerated building ceramsite comprises the following raw materials in parts by weight: 50 parts of sludge, 15 parts of ceramsite concrete waste, 8 parts of asbestos waste, 18 parts of modified ore powder, 20 parts of clay and 10 parts of composite fiber.

The modified ore powder raw material is selected from the following raw materials in a mass ratio of 1: 0.4: 0.2 vermiculite, basalt and fluorite.

The preparation method of the modified ore powder comprises the steps of taking raw materials according to the mass ratio, cleaning, crushing, sieving with a 200-mesh sieve, adding a polyvinyl alcohol aqueous solution, uniformly stirring, keeping the temperature in an acidic atmosphere, stirring for 150min, taking out, and drying to obtain the modified ore powder.

Wherein, the mass concentration of the polyvinyl alcohol aqueous solution is 10wt%, and the addition amount is 20wt% of the mass of the ore powder raw material. The acidic atmosphere is a 1.5M solution of tartaric or hydrochloric acid. The stirring is carried out at 80 ℃ and 80 rpm.

Further, the composite fiber is selected from a mixture of polypropylene fiber and plant fiber in a mass ratio of 1:0.8, and the plant fiber is selected from any one or more of straw, rice hull and waste paper.

The preparation method of the regenerated building ceramsite is the same as that in example 1.

Example 4:

an environment-friendly high-strength regenerated building ceramsite comprises the following raw materials in parts by weight: 50 parts of sludge, 30 parts of ceramsite concrete waste, 6 parts of asbestos waste, 10 parts of modified mineral powder, 35 parts of clay and 15 parts of composite fiber.

The modified ore powder raw material is selected from the following raw materials in a mass ratio of 1: 0.4: 0.2 vermiculite, basalt and fluorite.

The preparation method of the modified ore powder comprises the steps of taking raw materials according to the mass ratio, cleaning, crushing, sieving with a 200-mesh sieve, adding a polyvinyl alcohol aqueous solution, uniformly stirring, keeping the temperature in an acidic atmosphere, stirring for 30min, taking out, and drying to obtain the modified ore powder.

Wherein, the mass concentration of the polyvinyl alcohol aqueous solution is 10wt%, and the addition amount is 15wt% of the mass of the ore powder raw material. The acidic atmosphere is a 1.5M solution of tartaric or hydrochloric acid. The stirring is carried out at 80 ℃ and 200 rpm.

Further, the composite fiber is selected from a mixture of polypropylene fiber and plant fiber in a mass ratio of 1:0.8, and the plant fiber is selected from any one or more of straw, rice hull and waste paper.

The preparation method of the regenerated building ceramsite is the same as that in example 1.

The ceramsite prepared by the embodiment of the invention is subjected to performance test, the particle size is 5-15mm, the cylinder pressure strength can reach 4.2-4.8MPa, and the density is 350-³。

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.